Title:
METHOD OF PRODUCING OPTICAL FIBER PARENT MATERIAL, OPTICAL GLASS ROD, AND OPTICAL FIBER
Document Type and Number:
WIPO Patent Application WO/2006/049186
Kind Code:
A1
Abstract:
A silica-based glass rod (3) with a core section (1) and a clad section (2), the diameters of which both are uniform in the longitudinal direction, is heated and stretched, and gradually reduced in diameter to form a tapered glass rod (4). After that, the outer periphery of the tapered glass rod (4) is cut to form an optical fiber parent material (5) for an optical part, the optical fiber parent material having an outer diameter that is uniform in the longitudinal direction. Preferably, the tapered glass rod (4) having been reduced in diameter be heat-treated by flame or an electric furnace before the outer periphery is cut. The processing or treatment may be done by a glass lathe.
Inventors:
SAITOU MITSUO (JP)
SHIOMOTO KOUICHI (JP)
SHIOMOTO KOUICHI (JP)
Application Number:
PCT/JP2005/020141
Publication Date:
May 11, 2006
Filing Date:
November 01, 2005
Export Citation:
Assignee:
SHINETSU CHEMICAL CO (JP)
SAITOU MITSUO (JP)
SHIOMOTO KOUICHI (JP)
SAITOU MITSUO (JP)
SHIOMOTO KOUICHI (JP)
International Classes:
C03B37/012; G02B6/00; G02B6/02
Foreign References:
| JPH1121142A | 1999-01-26 | |||
| JPH08201639A | 1996-08-09 | |||
| JPH0431333A | 1992-02-03 | |||
| JPH0532430A | 1993-02-09 |
Attorney, Agent or Firm:
Ryuka, Akihiro (22-1 Nishi-Shinjuku 6-chom, Shinjuku-ku Tokyo, JP)
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